Answer:
Freshwater biomes are large areas consisting of plants and animals grouped around water with "less than 1% salt concentration." This includes lakes, rivers, ponds, streams, and some types of wetlands.
A. To understand the nature of an experimental subject
Genetic engineering is the answer
Why Earth's inner core<span> has speed trap for </span>seismic waves<span>. </span>Earth<span> has multiple layers: the crust, the mantle, the liquid </span>outer core<span> and the </span>solid inner core<span>. Something is not quite right inside the </span>Earth's core<span>. When </span>seismic waves<span> from earthquakes ripple through its </span>solid<span> center, they hit a speed bump.</span>